Grinding-cylinder.



No. 646,893. Patented Apr. 3, I900..

L. 0. 50mm.

GRINDING CYHNDEB.

(Application filed Dec. 22, 1895..) (No Model.) 4 Sheets-Sheet f.

wrmesses INVENTOR 61; a. M

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No. 646,893. Patented Apr. 3, |9u0.

.L. c. BONNOT.

GRINDING CYLINDER.

(Application filed. Dec. 22, 1898.)

(No Model.)

I'XZESS 0/')%MW.

Patented Apr. 3, I900.

L. C. BUNNDT. GRINDING CYLENDER.

(Application filed Dec. 22, 1898.)

(No Model.)

4 Sheets-Sheet 3.

MN W4 MW INVENTOR WITNESSES MAW Mia aw,

No. 646,893. Patented Apr. 3, I900.

L. c. BONNOT GRINDING CYLINDER.

(Application filed Dec. 22, 1898.) (No Model.) 4 Sheets-Sheet 4.

Xq K MWWA' W THE annals PETERS 120.. PHOTQ-UTHCL, WASHWGTON, n. 1:,

NITED STATES PATENT OFFICE,

LOUIS C. BONNOT, OF CANTON, OHIO.

GRINDING-CYLINDER.

SPECIFICATION forming part of Letters Patent No. 646,893, dated April 3,1900;

Application filed December 22, 1898. derial No, 700,010. (No modelJ Toall whont it Uta/y concern:

Be it known that I, LOUIS C. BONNOT, of Canton, in the county of Starkand State of Ohio, have invented a new and useful Improvement inGrinding-Cylinders, of which the following is a full, clear, and exactdescription, reference being had. to the accompanying drawings, formingpart of this specification, in which Figure 1 is a side elevation,partly broken away, of one form of my improved grinding or pulverizingapparatus. Fig. 2 is a vertical longitudinal section of a modified formwith the central portion of the cylinder broken away. Fig. 3 is avertical cross-section on the line III III of Fig. 2 looking toward theinlet end of the cylinder. Fig. 4 is a vertical crosssection of the formof Fig. 2 looking toward the discharge end, with the end plate partlybroken away. Fig. 5 is a detail broken end elevation of the cylinder,and Fig. 6 is a vertical cross-section of the delivery box or hood ofFig. 2.

My invention relates to the class of grinding or pulverizing cylindersfor reducing materials to a powdered condition, and is designed toprovide improved mechanism for feeding the material into the cylinderand to improve the construction of the cylinder itself and the outletstherefrom, as well as to provide means for collecting the materialissuing from said outlets.

In the drawings, 2 represents a horizontal cylinder having secured at ornear its ends bearing-rings 3 3, which rest within the recessedperipheries of supporting-wheels 4 4, which are arranged in pairs, asindicated in Fig. 3. The set of wheels upon each side of the cylinder issecured to a common shaft 5, and one of these shafts is provided with atoothed wheel 6, intermeshing with a pinion 7, secured to a driven shaft8, by means of which the cylinder is given a rotary motion.

The ends of the cylinder are closed by heads or end plates 9 and 10, thehead 9 having a ;central inlet 11, preferably made in the form of thefrustum of a cone. Within the outer end of this inlet is neatly fitted afeed-tube 12, a suitable stuffing-box 13 being secured to the inlet andsurrounding this tube to prevent the escape of dust or powdered materialat this point. The feed-tube 12 leads from the lower end of the hopperl4, and these parts are rigidly secured upon a suitable support l5.-Within the feed-tube 12 is placed a feedscrew 16, the inner end of whichis formed as a hub 17, which is secured to the inlet portion 11 byinclined connecting-webs 18, these webs preferably being inclined inopposite directions upon the opposite sides, as indicated in Fig. 2, forthe purpose of feeding the material forward into the cylinder and toprevent clogging of the same. By this simple connection between thefeeding screw and the rotating cylinder I drive this feedscrew directlywithout the use of outer intermediate connections, as heretoforeemployed.

The inner grinding-surface of the cylinder is formed by a series ofcast-iron rings 19, the meeting edges of which are machined so as to fitneatly together. These cast-iron rings are of smaller diameter than thecylinder, and to secure them in place I drive between their outerperipheries and the inside of the cylinder wooden strips 20, which arepreferably of the same length as the width of the rings. I have shownthese wooden strips or blocks as abutting together and forming acontinuous layer; but they may be separated and driven in at differentpoints around the rings and may be. of different lengths, though I havefound the form shown a convenient one for assembling, as by starting atone end I may secure one ring by its wooden backing-strips and theninsert the next and secure it in the same manner, and so on throughoutthe length of the cylinder.

The head or closing plate 10 at the exit end of the cylinder ispreferably provided with two annular series of outlet-openings 21 and22, and the passage of the material therethrough is regulated byslot-ted rings 23 and 24, secured to the outer face of the head by bolts25, passing through slots in lateral lugs 26 and through the head. Bythe use of the two sets of discharge-openings and theindependently-adjustable rings I am enabled to adjust the relative areaof the discharge-opening to accommodate the class of material beingground and to regulate the degree of fineness to which it is ground. Inthe form of Fig. 1 I have shown the head as provided with a centralplate 27, having a series of exit-openings through which the materialmay pass out; but this may be used or not, as desired. The head 10 isprovided with a projecting annular flange 28, which in the form of Fig.1 fits and rotates within the collecting box or receptacle 28', fromwhich leads the olftakepipe 29.

In the form of Figs. 2 and 4 I show the outer head of the cylinder asclosed at its central portion, and in this form I secure to the flange28 a closing-plate 30, having secured thereto a series of radial buckets31, which are open at one side. The curved inner ends of these bucketsdirect the material falling into them downwardly and outwardly throughthe holes 32 in the plate 30 into a stationary hood 33, which fits aboutthe neck 34, secured to and rotating with the plate 30. The form ofthese buckets or scoops is shown in Fig. 4, they preferably having bentouter ends, which are closely adjacent to the inner surface of theflange or ring 28. In this form the material passing out through theannular series of holes in the head of the cylinder is picked up by thescoops, and as they reach the upper portion of their travel the materialis fed out through the openings 32 to the collecting-head.

The head 9 is preferably provided with hand holes which are closed bysuitable plates 35.

In using the apparatus the cylinder is filled up to the desired heightwith the grindingballs 36 or similar material, as commonin this class ofmachines, and the material to be ground, being fed to the hopper, ismoved by the screw-feed into the cylinder. As it passes along throughthis cylinder it is acted upon and ground by the balls and passing outthrough the other end is collected and taken away to the point desired.

The use of the metal rings for the grindingsurface greatly reduces theexpense of operating the machine, while the wooden strips I give asimple and effective means for holding the rings. The construction ofthe outlets and the feed therefrom is simple and easily adj usted, whilethe parts are not liable to get out of order.

Many changes maybe made in the form and arrangement of the parts withoutdeparting from my invention, since I claim 1. A rotatorygrinding-cylinder having secured within the same a series of metal ringsabutting end to end and fastened by strips or blocks driven in betweenthe rings and the cylinder; substantially as described.

2. A horizontal driving-cylinder having an annular series ofdischarge-openings, and a slotted annulus adjustably secured to thecyliuder and arranged to regulate the size of said discharge-openings;substantially as described.

3. A horizontal rotatory grinding-cylinder having an annular series ofdischarge-openings, and an adjustable slotted ring rotating with thecylinder for adjusting the size of said discharge-openings.

4. The combination with a rotatory grinding-cylinder, having a series ofoutlets in its head, of a chamber into which the openings lead, saidchamber containing a series of buckets adapted to receive the groundmaterial directly from said outlet-openings, and mechanism for movingthese buckets in a rotary path, to receive and discharge the groundmaterial; substantially as described.

5. The combination with a rotatorygrinding-cylinderhavingaseriesofoutletppenings in its head, of a chamberinto which the openings lead, said chamber containing a series ofbuckets adapted to receive the ground material directly from saidoutlet-openings, mechanism for moving said buckets in a rotary path toreceive and discharge the ground material, and a stationary receptaclesituate at the inner ends of said buckets to receive the materialtherefrom.

6. A horizontal rotatory grinding-cylinder having annular series ofdischarge-openings, and two or more adjustable slotted rings forregulating the size of said discharge-openings.

In testimony whereof I have hereunto set my hand.

LOUIS C. BONNOT. Witnesses:

LULU RAOKLE, CHAs. KRIOHBAUM.

